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ok, great explanation. &nbsp;thanks.
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hello experts, i am using HttpQueryInfo to return some info about a remote file... and i came accross this<br />
<br />
&quot;HTTP_QUERY_ETAG <br />
54<br />
Retrieves the entity tag for the associated entity.&quot;<br />
<br />
<a href="http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wininet/wininet/query_info_flags.asp" rel="ugc">http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wininet/wininet/query_info_flags.asp</a><br />
<br />
it returns a string like this... &quot;1e806a-2e-418fe05c&quot;<br />
my question is what is an entity tag? &nbsp;what is it used for?
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hello experts, i am using HttpQueryInfo to return some info about a remote file... and i came accross this

"HTTP_QUERY_ETAG 
54
Retrieves the entity tag for the associated entity."

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wininet/wininet/query_info_flags.asp

it returns a string like this... "1e806a-2e-418fe05c"
my question is what is an entity tag?  what is it used for?

what is an entity tag? (HTTP_QUERY_ETAG)

C++ is an intermediate-level general-purpose programming language, not to be confused with C or C#. It was developed as a set of extensions to the C programming language to improve type-safety and add support for automatic resource management, object-orientation, generic programming, and exception handling, among other features.